Arc light



Gm. 5 Wwf w M M www m @ma S'Sheets-Sheet 1.

Patented Feb. 10,1891.

R. H. MATHHE.

ARG LIGHT.-

(N9 Model.)

(No Model.) 3 Sheets-Sheet 2.

R. H. MATHBR. ARO LIGHT.

N0*l 446,109. Patented Peb. 10, 1891.

2y 28 fa Mmmm @www www (No Model.) 3 Sheets-Sheet 3. R. H. M'ATHBR. ARGLIGHT.

Patented Peb. 10,1891.

ex R run" co., Pu wksuwcrcu, n. c.

UNITED STATES PATENT OEEICE.

RICHARD ll. MATIIER, OF IYIDSOR, CONNECTICUT.

ARC LIGHT.

SPECIFICATION forming part of Letters Patent No. 446,109, dated February10, 1891. application filed October ll, 1886. Renewed October 27, 1890.Serial No. 369,398. (No model.)

To (//ZZ 07mm 'it 71mg/ concern:

3e it kn own that I, RICHARD H. Mx'rnnr., ot lYindsor, in Hartfordcounty, Connecticut, have invented certain new and useful Improvementsin Electric-Arc Lamps, which are described in the followingspecification and illustrated by the accompanying drawings.

This invention includes a feeding device for the carbous of anelectric-arc lamp,and.com prises a reversible electric m otor, acompound switch which controls said motor, and intermediate mechanismwhereby positive motion is transmitted from said motor to one of saidcarbons.

The best mode in which I have contemplated the application of theprinciple of my invention is shown in said drawings, in which- Figure 1isa vertical section of my improved lamp. Fig. 2 is a top View of thesame, the cap being removed. Figs. 3 to 7, inclusive, are details. Fig.S is a diagram showing the course of current through the various partsof the lamp.

In the views, the numeral 1 denotes a castiron cylindrical box havingears 2 and 2, by which the box and dependent lamp may be Asuspended inthe position shown in Fig. 1.

This box is provided with bind ing-posts 3 and l, which are the positiveand negative terminals of the lamp, resjiiectively, and with a removablecap 5, which covers the otherwise open top of the box. 'Project-ingoutward and downward from box 1 and skirting its solid i'loor or bottomt5 is an annular 'flange 7, which externally presents the form of afrustum of a conc. This box is also provided with two bosses S and S,which project and open downward from floor (l within `flange 7. IVithinthis box is an electric motor, which is pret'- erably of the generaldescription exhibited in my application, No. 200,929, for a patent uponau electro-mechanical movement filed May 3, 1880. The held-magnet ofthis motor comprises two limbs, which are wound as an electro-magnet inthe usual manner with helices 9 and 10, respectively, and twopolepieces, which are adjacent to armature 1l. The latter is mounted inthe usual manner upon a shaft which is journaled in said fieldmagnet andin a yoke 12, which is bolted thereto. The com mutator 13 is mountedupon said shaft in the usual manner between the limbs of thefield-magnet aforesaid. Brushes 1l and 15, which allow commutator 13 toro tate in either direction, are held in proper positions otl contacttherewith by their respect ive brush-holders 1G and 17 ,which are boltedto opposite sides of said field-magnet, but are insulated therefrom.Said armature-shaft terminates in a worm 18. This motor maybe attachedto door G by screws, as shown in FiO. l. W'ithin the same box 1 andsimilarly attached to floor G is a switch, which is shown in Fig. et ina central vertical section on a broken line in Fig. 2. Thisswitchcomprisesan electromagnetof solenoid form, having helices 19 and20, which are wound in one and the same direction. The cylindrical core2l of this magnet is armed at the top with a proj ectinginsulated coppercontact-plate 22 and is perforated by a transverse slot Two insulatedstrips of copper 24. and 25 are mounted upon the switch-magnet withinreach of plate 22 and upon opposite sides of the same. Athird insulatedstrip of copper 26 is similarly mounted just below copper 25. A lever27, which is centrally pivoted in a standard rising from the top of theswitch-magnet, enters slots 23, and being` provided with a terminalspring 28 tends to litt core 21. Similarly attached in box 1 is asimilar' solenoid electronnagnet 2), which is shown in Fig. il as acentral vertical section upon a broken line of Fig. This magnet has asingle helix 30 and a cylindrical core 31, which is perforated by atransverse slot 32, and is armed at the top with a projecting insulatedcopper contact-plate Upon magnet29, just above and within reach of plate323, is mounted an insulated strip of copper 3ft. A lever 35, which iscentrally pivoted in a standard rising from the top of magnet 20, isprovided with a spring 3G, which tends to litt core One end of thislever passes through slot 32, while the other end of the same forkslaterally in two branches, between which is pivoted collar 37. In thesame box is the upper portion of the feedingrod 3S, which is a straightbar of brass passing loosely through collar 37 and provided with aterminal fixed collar or stop 39. This rod is journaled in the two armsof a double standard 40, which is attached by screws to IOO thefield-magnet of said electric motor. A

worm-wheel 41, having a slotted hub 42, is mounted loosely upon rod 38between the arms of standard 40 in a position of constant 5 engagementwith worm 18. A pin 43, projecting radially from rod 38, is radapted totravel from end to end of the slot in hub 42. The electricalcontinuity'ot rod 38 is `interrupted by an insulating-joint 44, which isxo shown in longitudinal sectioninFig. 5. lThis joint is preferablyconstructed` inthe .manner exhibited in David lVilliamsons application,Serial No. 195,797, fora patent on insulatingjoints, tiled March 19,1886. According t that r :manner-.of yconstruction: said rod isy dividedirinto two, portions, one ot which iszarmed with a".tixedrterminalcollar.46,while the Yother is reduced to. the; form ot'fatongue 45, which isfpifotlidedwvith afterfminal'screwfthread. vThis zo tonguefpasseslthrough. collar. V46aand `is sepa- "vratedtherefrom" by. air indefinite.number of 'mica'fdisks'xor washers i and @byan- 'interme- 3 Saperend'of'- each tube 52'is inserted inaboss i8 a at the; bottom-offbox1,-v and 4is held-therein byia set-screw. The' lowerz end 'of` each tube152'fissiniilarlv insertedI and'fheld'fin one end otyokei. '.lhe-middle`part of this-yoke 4o' vcontains f, anA insulated 1 carbonholder, which.'is'fshowu'invertical sections in Figs. 1 and 7. Thisl'carboneholderconsistsot-a metallic tube 5.4,'1swhich .is.op'enat`-both =ends,isprovided V '.wit-hna stopftiange556x211'.y the; top,rv and with; an

4 5 a'insulatedfset-screw 57, andis separated from l.yokev by a: sleeve155,-which is of-similar "for-ms and of `insulating .,fmaterial. Asliding Ayoke-'60 is 'formed' on tubes 52'by ymeans of twolikefmetall-ic sleeves 59 andan "interme- 5o.l diate -cro'ssfpiece 58.This crosspiece is rigidlyl'joined'- to..eachcot`1said sleeves-and isvinf snl'ateditherefrom by the-suse'of V-mica washcrs,applied in, theEmanner illustrated in Fig. 1. Thisyoke is providedzwith av central car-5 5 Vbong-holder:61: for the upper carbon "of the flamp. YokeffGO .-fisf also yprovidedwith adevice"'foreecti.ng an engagement with thevfeeding-rod 38. This L engaging device conzsists of; a ltubularenlargement ofyoke l60 and 6o sliding en gagement-block 62 in closedthere-l gagement between said block 62 and rod 38.

This block is hollow and contains a cam 65,

and24 are-alsoheld inmutual contact. It now in this position y .ofaffairs' a normal. current be supplied from the generator, that currentpasses from terminal 3 in two principal courses as follows: Oneportionaof .said curwhich is pivoted in-said yokeand is provided with afinger-piece 66 and a spring 67.

-coarse wire 69 with copper .24.and by coarse wire4 70 with -helix 9.Brush-holder V`16 is connectedwvith helices 9 .and 10 bycoarse wires 71-:and vv 72, respectiyely. Helix l0 is con nectedfby coarse wire 73 withhelix 30, and 8 5 that'I helix is-connected bycoarse 7 4 wire withlbrush 50. '-'Helix 10 Ais also connected through wire 73;-andbyfacoarse wire .-75t branching therefromA with helix 1i), -which is,yconnected by. eoarsewire 7 6..with'copper 34. Terminal 9o 4 isconnected with holder 86 by wire 7 7and' with contact-plate v33. by wirey7 8. I Copper 25 `is connectedvbywire 79.with-wire 73. Cop- :-per 26is-connected bywire 80 withbrush 50, and copper 22 by wire l81Withg'holder 95 17. Helix is connected -with terminals 3 and. 41byline-wires 82 .and 83, respectively.

Byvmeans'of terminals 3 and 4the lamp is placedfin circuit with agenerator in the usual manner.

IOO This invention further presentsl all other features andparticularsof construction which yare'necessarilyinvolved in itsfmode,of` Voperation, which is nowto be explained.

AVthenno current issupplied tothelamp, lever-3-oceupies thepositionshown in` Fig. 3, and plates -33-.and 34vare consequently inmutual contact. 4At-the same time leverVA 27 isdefiected to such aposition thatplates 22 IOS IIO

rent passes bywire 69 to copper 24, the-nce immediatelypto copper 22;thence bywire 81 to jholder 17, kthence successively through rbrush 15,commutator. and armature 13: and

11,1-,and brush 14 to holderv 16, and thence in the course hereinafterAdescribed. A 4second portion ofsaid current. passes from terminal 3through wire70, helix 9,-wire 71 to holder 16. The currentso conductedin two courses -toholder 16 goes thence through'wire 7 2and helix 10towire 73 and there dividesinto two parts, one of which.l goes onthrough helix '30, wire 74,r brush 50,rod 38, yoke 60,--4carbons 84Aand-85, and wire 77 to terminal 4, while the r other part ypassessuccessively vthronghfwire 75, helix,19wire 7 6, coppers 34and 3.3, and13o vwire78-to the same terminal 4. VAtthesame time `an in'appreciablepai-tof the current which is supplied passes between said terminals bythe wayof wires 82 and 83 and helix 20. lhis distribution ot current,however, is but momentary. For the passage ot current through the motorthe switch-magnet and the lifting-magnet energize those devices in thefollowing manner: The action of magnet instantly causes theabove-inentioned portion of current passing through helix 19 to be'interrupted between plates 33 and 3l. Lever 35 of magnet 2) then comesinto engagement with stop-collar 39 by means et collar 37, and therebylifts rod SS, sliding yoke GO and carbon Si u ntiithelatter is separatedfrom carbon S5 by a distance which is slightly greater than their normalseparation. Under the action of helix 2O ot the switchmagnet copper 22is separated from copper la and brought to contactwith eopper25. Thisinterrupts the current which flowed in the above-delineated coursethrough armature ll and allows a current to pass from holder 16, throughbrush 14E, through armature and commutator 11 and 13 in a reversedirection, and thence successively through brush 15,liolder 17, wireSl,coppers2 and 25, and wire 79 to wire 73. Said motor acting upon rod238, through worm 18, worm-wheel il, slotted hub a2, and pin 43, rotatesthat rod in such a direction as to move yoke G0 downward, and this downward motion continues until the separa-tion et' said carbonsis reducedto the normal length oi' the are for which thelam p isadjusted. Throughthe diminished electro-magnetic eiiiciency ot' the switch-magnet themutual contact of coppers 22 and 25 is then in turn interrupted and themotor stops. It the carbons should be at a distance from each other whenthe lamp is started up, the upper carbon will be carried downward as faras may be necessary, in the manner last described, and with the saineresult, and whenever during the operation of the lamp the carbons becomeunduly separated through the ordinaryconsumption of the same or throughany other cause the consequent increase ot' resistance in the earbon-circuit so increases the current through helix 20 that coppers 22and 25 are brought together again, and the motor is again brought intooperation in the same manner and with same eftect as before; butwhenever the carbons approach too near to each other theelectro-magnetic etiieiency of the relay-magnet is reduced, contact ismade again between coppers 22 nd 2l, current passes again througharma-ture l1 in the course first above described, the motor is reversed,the upper carbon is thereby raised, andthe normal separation of thecarbons is thus restored.

It any stoppage occurs during the operation o't the lamp and the carbonsconsequently remain unduly separated, the energy exerted by therelayanagnet is increased, and copper 22, pressing downward with unusualtorce upon the top of copper bends the latter to a position ot' contactwith copper 2U. The current from wire 73, through helix and wire 7i tobrush 50, is thus short-circuited by the way of wire 79,'coppers 25 and2U, and wire SO to brush 50, and lifting-magnet 29 is inactive. Copper33 consequently rises to contact with copper 34, and thus the carboncurrent is shortecircuited through the armature and the field-magnethelices of the motor and through relay-helix 19. The re lay-magnet thenholds coppers 25 and 22 in mutual contact, as above described, and thecarbon current remains short-circuited, as described, so long as thestoppage continues.

It through accidentor heedlessness the upper carbon having run by shouldbe found partly side by side with the lower carbon when current issupplied to the lamp, the motor will feed backward until the carbons areduly separated in the manner already described.

ln this improved lamp carbons ot double length can be used in a frame ofordinary dimensions. At the same time the separation and approach of thecarbons are eiiectcd by a positive motion and are controlled with greatdelicacy and precision.

llaving described the construction and operation ot my invention, l nowclaim- 1. In an electric-arc lamp, a movable carbon-carrier, areversible electric motor whose held-magnet is excited by two helices inseries and whose armature is located in a derived circuit, and acompound switch having' separate connections with said armature and withthe held-magnet circuit upon opposite sides ot the field-magnet, incombination with mechanism for transmitting motion from said armature tosaid carrier, substantially as and for the purpose specified.

E. In an electric-arc lamp, a carbon-carrying slide, a rotary electricmotor whose 'fieldmagnet is excited by two helices arranged in series, atwo-point switch having one ot its points connected tothe circuit on oneside ot' said helices and having the other ot' said points connected tothe circuit on the other side of said helices, and a connection from theswitch to the circuit containing said helices at a pointbet-ween thelatter, said connection containing the armature ot' said motor,incombination with mechanism which is adapted to convert the rotary motionet said armatureinto rectilinearmotion et said slide, substantially asand lor the purpose spccilied.

ln an electric-arc lamp, a carbon-carrier, a reversible rotary motorhaving two fieldmagnet helices, and an electro-magnet and an armaturethereof provided with suitable contacts and connections whereby thearmature of said motor is connected in series with one and in parallelwith the other of said helices or in parallel with the former and inseries with the latterot' said helices, or is dis connected from both,according as the armature of said electromagnet is moved to a pre`determined limit in one direction or in the other direction, or is notmoved to suchlimit,

IOO

in combination with mechanism which is .adapted to convert the rotaryVmotion ot the .armature ofsaid-motor into -rectilinear motion of saidcarrier, substantially as and for the purpose specied.

4.1111 van ,electric-arc lamp, la vfeeding-rod which is provided Vwitha-screw-thread and an engagement-pin, in combinationwith .a`carybon-carrierwhich engages saidithread, and :0-a wheel having aslotted hubiwhichcengages 'saidj pin, substantially as and for the`purposes specied.

5. Iii-an electric-arc lamp,a sliding yoke whichfhas two4 sleeves joinedand held rigidly parallel by anintermediate cross-piece-which isinsulated from each of said sleeves and is provided with a carbon-holderand with mechanism for engaging a feeding-rod, substan- .rtially as andfor. thepurpose specified.

6.- Inaan .electric-are lamp, a reversible ro- V.tary=motor,;a.feeding-rod which is provided 4with .a screw-thread, :intermediategearing whereby said. motor constantly engages said feeding rod, andalifting-magnetwhichis-ap- 2 5 pl-iedtosaid feeding-rod,in;combination-with a sliding-yoke having two sleevesjoined and :heldrigidly parallel by-an intermediate cross- .piecc whichfis.insulatedlfrom each ot r.said sleeves and is provided witha carbon-holder 3oandwithV a-spring-seated engagement-block foriengagingsaid feeding-rodby means of said screw-thread, substantially as and for the vpurposespecified. .7. Inan electric-arclamp,.a four-contact 3 5 switch --whoseactuating` magnet is wound with two helices arranged in parallel witheach other and: with vthe -carbons ofthe lamp, substantially as andfor-the purpose specified. -8. .In anelectric-arc lamp, a rotaryfeeding- 4o rod-which is divided into two partsby meansotaninsulating-joint, in combination with rotating mechanisnrwhichengages one of lsaid parts-,and carbon-carrying mechanism -andianelectric brush Vwhich-are in contact withthe other of saidy parts,substantially.v as

andfor the purpose .specied 9. I-n anelectric-arc lamp, a pairotcarbons, a stationary'carbon-holder, a movable carbonv carrier; areversible electric motor, a feedin 5o `rod whichhas a screw-threadengaging said carrier, intermediate gearing whereby said motor engagessaid rod, a four-contactswitch whose actuating-magnet is wound with two,helices arranged in paral-lel with each other 555and-fwith saidcarbons, a liftingrmagnet, and .a switch operated thereby, which opensand vcloses the circuit-connection of one of said helices, inYcombination with a lever engaging said feeding-rod and the armature ofsaid lift- 6o fing-magnet, substantially as and for the purpose-speci-ed.

-10. In an electric-arc 1amp,.carboncarry ingvmechanism, a reversibleyelectric lmotor k'actuating said mechanism, and a three-pointswitchhav'ing two helices which arelocated in-separate shunts about.thecarbons otsaid lamp, in combination with afmainfcircuitlifting-magnetvprovided with `,circuitfbrez'tking mechanism which isapplied' to onev-of lsaid vshun-ts, substantially. as and for the purpose specified.

1l. In an electric-arc lamp, carbon-moving mechanism, a reversible motorworking said mechanism, a three-point switch controlllng said motor andhaving two helices, oneofsaid helices being composed .of fine. wire..andlorcatedina constantly-closed shunt-circuit yabout the cal-bons ofthelan1p,.an`d,the other Yof said helices beingcomposed of coarse wire andlocated in .a shunt-circuit about said carbons, in combination with valiftingfmagnet provided .with circuit closing ,mechanism `which is,applied to the last-m entioned Vshuntcircuit,substantially asv and forthe purpose specified.

12. In an electric-arclamp, a movablecarbon-carrieigan electricL motorwhose...eld

magnet yis excited by two helices infser-ies andwhose armature 4islocated ina-'derived circuit,y and, gear mechanism engagingsaid armatureandusaid'carrier, in combination with a vfour-contacty switch l.whoseactuating magnet is-wound with two helices. severally arranged inparallelwith the carbonsotthe lamp,.substantially as and -t'orf thepurpose specified.

`are located in separate shunts about the carbons of the lamp, in,combinationwith a ycir-. cuit-breaking mechanism whichy is applied toone of isaid shunts, substantially as and for the purpose specified.

14. In an electric-arc lamp, a. movable carbon-carrier, an r.electricmotor whose vrfield.- magnet .helices are yarranged vin seriesv andwhose armature is located in. abranch circuit Lconnecting withthe.field-magnet c-ircuitat a pointbetween said.helices, and a compoundswitch controllingsaid motor and having'two .helices which are locatedin separately-derived circuits about the car-bons of thelamp, in

i combination vwith a-liftingFmagnet andra circuit-breaking mechanismwhich is applied to .one of said derived circuits, substantially. as

and for the purpose specified.

In testimony whereof I` have hereunto set mynamelinthe presence ottwowitnesses.

vRICHARD H. AMATHER.

Witnesses: Y

y WILLARD Enma'i W. M. BYORKMAN.

IOO

IIO

